QR Code – Quick Response Code, is a popular 2d barcode that can store up to about 3000 bytes.
There are 40 versions of QR Codes and 4 error correction levels.
New Android and iOS devices have built-in support for reading QR codes in the default camera app.
QR codes can help bridge the physical world with the online world.
![](https://www.b4x.com/basic4android/images/SS-2018-05-16_18.56.16.jpg)
Generating QR codes in B4X is very simple with QRGenerator class: https://www.b4x.com/android/forum/threads/b4x-qrgenerator-cross-platform-qr-code-generator.93092/#content
Reading QR codes:
B4A – https://www.b4x.com/android/forum/t…on-google-play-services-vision.89705/#content
There are other libraries as well.
B4i – https://www.b4x.com/android/forum/threads/ibarcode-library.47354/#content